ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Algebra II Videos 107 videos
Elementary Algebra Drill 2: Problem 2. Can you find the product?
Factoring polynomials allows us to group things—and everything's always better in groups. Well... almost everything.
ACT Math Elementary Algebra Drill 3, Problem 4. Solve for y in this equation.
ACT Math 5.3 Intermediate Algebra 310 Views
Share It!
Description:
ACT Math: Intermediate Algebra: Drill 5, Problem 3. What does f(g(-1)) equal?
- Intermediate Algebra / Functions
- Product Type / ACT Math
- Foreign Language / Arabic Subtitled
- Foreign Language / Korean Subtitled
- Foreign Language / Chinese Subtitled
- Foreign Language / Spanish Subtitled
- Functions / Build new functions from existing functions
- Functions / Build new functions from existing functions
- Functions / Build new functions from existing functions
- Functions / Build new functions from existing functions
- Intermediate Algebra / Modeling
Transcript
- 00:02
Here's an unshmoopy question you may find on an exam somewhere in life...
- 00:06
If f of x equals 1 over x plus 1, and g of x equals x squared, what does f of g of negative 1 equal?
- 00:13
And here are the potential answers...
- 00:19
It's asking us about composite functions.
- 00:25
When we solve for f of g of negative 1, we're basically trying to find the result of g of
Full Transcript
- 00:31
-1 when sent through the function f of x.
- 00:36
g of negative 1 is just negative 1 squared...or 1.
- 00:41
This gives us f of 1... with 1 as our new x value. 1 over 1 plus 1 equals 1/2.
- 00:50
So the answer is D.
Related Videos
ACT Math: Plane Geometry Drill 3, Problem 1. What is the area of the trapezoid shape in the video?
ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?
ACT Math: Intermediate Algebra: Drill 3, Problem 1. Find the fifth number in the series.
Don’t even think about starting up your combo lemonade/fro-yo stand without first making sure you understand piecewise functions. You’re just a...
Domain and range: two terms you will learn to love (or hate with a vengeance). The domain is the set of all possible x values, and range is the set...